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Journals Mining Engineering : Bina Tambang
Published by Universitas Negeri Padang
ISSN : -     EISSN : 23023333     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
Atas dukungan dari jurusan Teknik Pertambangan dengan Penanggung Jawab Dekan Fakultas Teknik UNP (Drs. Ganefri,MPd, P.hd) bekerjasama dengan Ketua Jurusan Teknik Pertambangan (Drs.Bambang Heriyadi,MT) dan seluruh Dosen Jurusan Teknik Pertambangan Fakultas Teknik Universitas Negeri Padang. Jurnal ini terbentuk dan didukung penuh untuk sarana kretifitas Dosen dan Mahasiswa Teknik Pertambangan.
Arjuna Subject : -
Articles 609 Documents
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Analisis Kelayakan Ekonomi Tambang Batu Andesit Menggunakan Metode Discounted Cash Flow PT. Ansar Terang Crushindo Site Atc 1 Kecamatan Pangkalan Koto Baru, Sumatera Barat. Ainil Khalisah; Mulya Gusman
Journals Mining Engineering : Bina Tambang Vol 5, No 4 (2020): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v5i4.109427

Abstract

Abstract. PT. Ansar Terang Crushindo site Atc 1 is a company that conducts andesite mining which has 10.899.982 tons of andesite reserves and 20 years of mine life. The parameters for this research can be seen in terms of economics, needs for tools’ estimation, and the income from the andesite selling. Then investment analysis and economics appropriateness of the mine are needed to see the prospect of andesite reserves whether they have economic value in the location. The parameters used to determine the economics appropriateness in the production of andesite at PT. Ansar Terang Crushindo site Atc 1 is Net Present Value (NPV), Internal Rate Return (IRR), and Payback Period (PP). Based on the result of economics analysis research, it was obtained the Net Present Value Rp. 1.794.057.062.400,, Internal Rate Return 41%, and Payback Period of 2,8 years, so the project is worthy to run. The estimated equipment needs are 1 unit of Komatsu PC 400 Excavator, and 4 Mitsubishi Fuso 250 PS FN 627 40T Dump Truck to overburden removal, and for ore getting requires 1 Komatsu PC 300 Excavator and 3 units of Mitsubishi Fuso 250 PS FN 627 40T. The income from the andesite selling was Rp. 1.080.000.000.000. Keywords: Analisis investasi, econimic feasibility, estimation of tool requirements, NPV, IRR, PBP, andesite stone sales.
Perencanaan Jalur Ventilasi dan Sistem Jaringan Ventilasi Udara Pada Tunnel Mainshaft Auxiliaryshaft Tambang Bawah Tanah PT. Allied Indo Coal Jaya Sawah Lunto Noval Satria; Bambang Heriyadi
Journals Mining Engineering : Bina Tambang Vol 5, No 4 (2020): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v5i4.109272

Abstract

Abstract. There are two kinds of underground mining systems which are natural ventilation systems and mechanical ventilation systems. The air quantity at the front of J6 and J7 does not meet the permitted standards in the Minister of Energy and Mineral Resources RI No. 1827 K / 30 / MEM / 2018. The air quantity at the front of J6 is 1,136m3 / second the air needed is 7,233 m3 / second and the amount of air in front of J7 is 1,528 m3 / second while the amount needed is at 7,167 m3 / second. At Front Junction 6, the available air demand is 1,136 m3 / sec while the air required is 7,233m3 / sec. A blower of 8.3 Kw ≈ 10.5 Kw is needed, and at the front of Junction 7 the available air demand is 1,528 m3 / s, the air needed is 7,167 m3 / s for the air demand when mining activities are needed, the blower power is 8.9 Kw ≈ 10,5 Kw. New air circulation modeling design using Kazemaru software.Keywords: Vetilation Lines, Ventilation Network Sistem,Underground Mining, Air Quality and Air Quantity
Hilirisasi Kegiatan Penggalian dan Pengangkutan pada Penambangan Batu Kapur di PT. Semen Padang Intan Maharani Besri; Mulya Gusman
Journals Mining Engineering : Bina Tambang Vol 5, No 4 (2020): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v5i4.109428

Abstract

Abstract. PT. Semen Padang, which was established in 1990, is a state-owned company (BUMN) which is a national cement producer for the needs of the domestic market. PT Semen Padang uses the open pit mining method with a quarry mining system which includes land clearing, material unloading by blasting, loading, transporting and processing materials. to dismantle hard rock is usually done by blasting. The resulting blasting vibration must be in a safe condition for the surroundings. The reality on the ground is that blasting often creates impacts and complaints for the communities around the mine. The purpose of this paper is to find the results of the blasting fractionation produced by loading hauling and about the environment around the mine. The location of this research was carried out in the Karang Putih area of PT.Semen Padang, Padang City, West Sumatra Province in November 2019. From the blasting activity, the size of the rock fragmentation resulted from the blasting was small from 80 cm, only 53.218%,From loading and hauling activities, the Hitachi EX 2500-6 (EH06) excavator productivity is 805.47 tons / hour, the Komatsu 785-7 Heavy Dumptruck is 203.177 tons / hour, the required Heavy Dumptruck is 4 units, and the work compatibility of the tools is 0.807. , Crusher VI productivity is 2128,761 tonnes / hour and the total production in December 2019 is 10218.0545 tonnes / month. water pollution control, Air Pollution Control, Noise Level Quality Standards, Vibration Level Quality Standards. Keywords: fragmentation, productivity, production, limestone, environment
Kajian Teknis Geometri Peledakan berdasarkan Analisis Blastability Index untuk Mencapai Target Fragmentasi Ideal dan Diggability PC2000 Komatsu pada Material keras Seam D2, C2 dan DU di PIT 7 West PT. Bukit Makmur Mandiri Utama Jobsite Binungan-Suaran, Kabupaten Berau, Provinsi Kalimantan Timur Fellya Septia Fauzi; Dedi Yulhendra
Journals Mining Engineering : Bina Tambang Vol 6, No 2 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i2.111698

Abstract

Abstract Determining the blasting geometry and blasting material filling must pay attention to the characteristics of the rock’s mass and geological conditions to obtain the ideal fragmentation, where the boulder size is less than 15% with a maximum size 1/3 of the bucket loader used. An alternative geometry experiment had conducted to solve the problem of boulder fragmentation and blasting hard material so the digging equipment rate could increase according to Komatsu's PC2000 plan productivity at PT. BUMA Jobsite BINSUA. An alternative geometry design is determined by researching the rock mass characteristics based on Lili's Blastability Index, includes the Rock Mass Description, Joint Plane Spacing, Joint Plane Orientation, Specific Gravity Influency, and Hardness. Therefore, the actual rock value had obtained from the blasting location and the alternative geometry recommendation using the R.L.Ash theory combined with the Vertical Energy Distribution theory. On C2 layer with 5.95 of the rock factor value recommended burden 7.2 m, space 8.3 m, and a VED explosive charge of 48%. On the D2 layer, the rock factor value is 6.89 with a load of 7.5 m, space 8.3 m, and 55% filling of explosives VED. Besides, on the DU layer, the rock factor value is 6.39 with a load of 7.3 m, space 8.4 m, and 51% filling of the explosive VED. The prediction of blasting fragmentation analysis used Kuz-ram theory obtained fragmentation > 100 cm is 14.99% for the C2 layer, 14.84% for the D2 layer, and 14.82% for the DU layer.Keywords: Blastibility Index, Fragmentasi, Blasting Geometry, R.L.Ash, VED
Analisis Kestabilan Lubang Bukaan Tail Gate BT-06 Berdasarkan Klasifikasi Geomekanika (RMR-System) Pada Penambangan Bawah Tanah PT. Cahaya Bumi Perdana, Sawahlunto Fenny Aulia Gustin; Raimon Kopa
Journals Mining Engineering : Bina Tambang Vol 5, No 5 (2020): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v5i5.110042

Abstract

Abstract. The excavation of a tunnel through the rock mass causes its balance to be disrupted, hence the rock is unable to support its own load, the ground surrounding the excavation will collapse. Several analytical techniques such Geotechnical analysis which uses the Rock Mass Ratting System can be used to identify the rock mass characteristics in a tunnel. This research would provide findings based on rock mass class, rock strength, safety factor depends on the potential for wedge collapse and ground support recommendations. Based on the weighting obtained by the RMR system analysis, it is found that with a stand up time of 260 hours, the rock mass class is in Class III (fair rock). A safety factor of 16.471 (stable wedge) and 3 potential general joint directions that have the possibility for wedge collapse are obtained on the basis of the processing results (N173 ° E / 76 °, N142 ° E / 24 °, N113 ° E / 28 °).The RMR weighting data analysis suggest that if using rock bolt (20 mm diameter fully grouted) with a length of 4 m and a spacing of 1.5-2 m on the walls and roof then  added wire mesh installation, 50-100 mm thick shotcrete on the roof and 30 mm on the wall. Furthermore, if the wooden support is needed, use wood with a diameter of 20 cm, 2 m long and class IV with a spacing of 1.5 m.Keywords: Tunnel, Geotechnical, RMR-System, Safety Factor, Ground Support. 
EVALUASI KINERJA BAN HD 785-7 DAN 777 PADA JALAN ANGKUT TAMBANG DARI FRONT 2 KE CRUSHER III A DAN III B PENAMBANGAN BATU KAPUR PT. SEMEN PADANG Indra Lesmana Putra; Dedi Yulhendra
Journals Mining Engineering : Bina Tambang Vol 6, No 1 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i1.111801

Abstract

Abstract. PT. Semen Padang is one of the companies engaged in limestone mining located in Bukit Karang Putih, Indarung, Padang City. Each transport activity requires a mechanical device as a means to facilitated transport activities. PT. Semen Padang uses dump trucks Komatsu HD 785-7 and Caterpillar 777 D to move material from loading point to the Crusher. One of the important component of dump truck in transportation activities is the tires. Tires are one of the important components because the tires are in direct contact with the road surface. The main function of the tires is to hold the weight of a vehicle and the charge that is tangent to the ground surface, controlling the running of the vehicle and continue the power from the engine. So that the selection of proper tires becomes an important factor for the operation to run smoothly. To minimize the risk of tire damage, it is necessary to evaluate the performance of tires by conducting analysis of Key Performance Indicator (KPI) parameters. Which are used to measure tire performance are Ton Kilometer Per Hour (TKPH), Tread Utilization Rated (TUR), Lifetime, and transport condition. If the actual TKPH value has exceeded the TKPH rating, then the lifetime of the tires is not optimum , because it has passed the tire endurance limit. For the percentage value of the actual tire tread level (TUR), all tire used in the dump truck unit at the location must have a TUR safety standard of 85%.Keywords: Tires, Dump Trucks, KPI, TKPH, TUR, Lifetime.
Optimalisasi Produksi Alat Angkut Dump Truck Scania Patria x pro Model tv45 Berdasarkan Analisis Masalah Fishbone Pada Aktivitas Penambangan Batubara di seam A site Rantau PT. Kalimantan Prima Persada, Kecamatan Tapin Utara, Kabupaten Tapin, Provinsi Kalimantan Selatan. Ikhwan Pratama; Adree Octova
Journals Mining Engineering : Bina Tambang Vol 6, No 1 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i1.111691

Abstract

Abstract. The process of loading and transporting coal at PT. Kalimantan Prima Persada from the front to the crusher using a combination of 1 PC 400 type excavator with a capacity of 3.2 Lcm and a heavy tipper scania patria x pro model tv45 dump truck with a vessel capacity of 39 tons with 7 units of tools. In 1 month the planned production target is 163,054.23 tons / month.This study uses the QCC method to increase coal production targets. In the actual achievement in the field before the increase in production, only 121,314.78 tons / month were achieved or 74.40% of the target set by the company. Based on the paretto analysis, the main problem of not achieving coal production is the amount of work time wasted 2,277.78 hours / month from the available time of 5040 hours / month.By making improvements to wasted working time using the QCC method for coal production of PT. Kalimantan Prima Persada increased to 39%. Keywords: Excavator, Dumptruck, Production, Quality Control Circle, Paretto.
Deashing Pada Batubara Menggunakan KOH dan HNO3 Sebagai Leaching Agent Hendly Syahputra Pratama; Fadhilah Fadhilah
Journals Mining Engineering : Bina Tambang Vol 6, No 2 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i2.111749

Abstract

Abstract. The negative effects of the high ash content of coal results in cement factories, air pollution and other damaging effects. In addition, it is also inefficient if it is used for carbonization, combustion, gasification, and liquefaction purposes. Therefore we need a way to reduce the ash content of coal. The process of reducing coal ash content is known as deashing. The most effective deashing method is chemical washing of coal using alkaline and acid solutions, also known as the leaching method. KOH and HNO3 are the solvents most commonly used as leaching agents in the deashing process. The coal used in this study is Seam C coal from the CV. Tahiti Coal Sawahlunto. Seam C coal has an ash content of 16.5%. Coal samples were leached using KOH and HNO3 with variations of 5%, 10%, 20%, and 30% for KOH while the concentration of HNO3 was 10%. After leaching the samples were analyzed using the LECO TGA701. The optimum conditions were obtained at concentrations of KOH and HNO3 of 30% and 10%.Keywords: deashing, coal, ash, potassium hydroxide, nitric acid
Studi Penempatan Sumur Resapan Berdasarkan Nilai Laju Infiltrasi, Kualitas Fisik Air, dan Tekstur Tanah pada DAS Air Timbalun dan Sungai Pisang Di Kota Padang Fajar Inaqtiyo Zalaff; Rusli HAR
Journals Mining Engineering : Bina Tambang Vol 6, No 1 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i1.111346

Abstract

Abstract. Groundwater is a vital natural resource for humans whose availability is diminishing due to population growth. Where the infiltration area located east of the city of Padang began to changes into housing, offices, etc. This causes a reduction in catchment areas, flooding and decreasing environmental quality, especially groundwater in the Air Timbalun and Sungai Pisang Watershed. To reduce flooding in the Air Timbalun and Sungai Pisang Watershed, a study of placement of absorption wells was conducted based on infiltration rate values, physical quality of groundwater, and soil texture.The study was conducted at 26 points in the alluvium area of the Air Timbalun and Sungai Pisang watershed. With the data obtained of groundwater physical quality data, soil texture, and other supporting data.Based on the data obtained the average value of infiltration rate in the study area of 0.058828 cm/minute is classified as a low absorption area (<0.5 cm/minute). After conducting research by observant statistical analysis of linear regression, physical quality of water, soil texture, lithology conditions, and land use in the Air Timbalun and Sungai Pisang Watershed. So the placement of absorption  wells is spread over 14 points in the Air Timbalun and Sungai Pisang Watershed, Padang City.  Keywords: Absorption Wells, Infiltration Rate, Physical Quality of Groundwater, Soil Texture, Lithology
Analisis Kelayakan Investasi Menggunakan Metode Discounted Cash Flow pada Tambang Aspal PT. Wijaya Karya Bitumen di Desa Nambo Kecematan Lasalimu, Kabupaten Buton, Sulawesi Tenggara Triyanchy Afaz; Mulya Gusman
Journals Mining Engineering : Bina Tambang Vol 6, No 2 (2021): Journals Mining Engineering: Bina Tambang
Publisher : Departemen Teknik Pertambangan FT UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/bt.v6i2.111703

Abstract

Abstract. PT. Wijaya Karya Bitumen is a company that plans to mine asphalt with an IUP area of 100 HA in Nambo Village, Lasalimu District, Buton Regency, Province of Sulawesi Tenggara. The total reserves are 5.945.000 tons with a selling price of IDR 270.000 / ton which is estimated to have a mining life of 16 years. This study aims to analyze the feasibility of investing in asphalt mining in terms of technical, economic and environmental aspects, using the discounted cash flow (DCF) feasibility analysis method to see whether a mine with asphalt production is feasible or not. The investment feasibility analysis parameters used are net present value (NPV), internal rate of return (IRR), pay back period (PBP) and profitability index (PI).The results of this study, obtained cash out flow of IDR 646.677.059.124 and cash in flow of IDR 2.088.966.982.500. Based on the discounted cash flow (DCF) method, the NPV results were IDR 206.854.298.263, an IRR of 15.99%, PBP for 3 years and 3 months and a PI of 3,127.Keywords : Investment Feasibility, Discounted Cash Flow (DCF), Technical Aspects,Economic Aspects, and Environment.

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